/**<br>
* 根据文件后缀获取mime类型<br>
* @param string $ext 文件后缀<br>
* @return string mime类型<br>
*/<br>
function get_mime_type($ext){<br>
static $mime_types = array (<br>
'apk' => 'application/vnd.android.package-archive',<br>
'3gp' => 'video/3gpp', <br>
'ai' => 'application/postscript', <br>
'aif' => 'audio/x-aiff', <br>
'aifc' => 'audio/x-aiff', <br>
'aiff' => 'audio/x-aiff', <br>
'asc' => 'text/plain', <br>
'atom' => 'application/atom+xml', <br>
'au' => 'audio/basic', <br>
'avi' => 'video/x-msvideo', <br>
'bcpio' => 'application/x-bcpio', <br>
'bin' => 'application/octet-stream', <br>
'bmp' => 'image/bmp', <br>
'cdf' => 'application/x-netcdf', <br>
'cgm' => 'image/cgm', <br>
'class' => 'application/octet-stream', <br>
'cpio' => 'application/x-cpio', <br>
'cpt' => 'application/mac-compactpro', <br>
'csh' => 'application/x-csh', <br>
'css' => 'text/css', <br>
'dcr' => 'application/x-director', <br>
'dif' => 'video/x-dv', <br>
'dir' => 'application/x-director', <br>
'djv' => 'image/vnd.djvu', <br>
'djvu' => 'image/vnd.djvu', <br>
'dll' => 'application/octet-stream', <br>
'dmg' => 'application/octet-stream', <br>
'dms' => 'application/octet-stream', <br>
'doc' => 'application/msword', <br>
'dtd' => 'application/xml-dtd', <br>
'dv' => 'video/x-dv', <br>
'dvi' => 'application/x-dvi', <br>
'dxr' => 'application/x-director', <br>
'eps' => 'application/postscript', <br>
'etx' => 'text/x-setext', <br>
'exe' => 'application/octet-stream', <br>
'ez' => 'application/andrew-inset', <br>
'flv' => 'video/x-flv', <br>
'gif' => 'image/gif', <br>
'gram' => 'application/srgs', <br>
'grxml' => 'application/srgs+xml', <br>
'gtar' => 'application/x-gtar', <br>
'gz' => 'application/x-gzip', <br>
'hdf' => 'application/x-hdf', <br>
'hqx' => 'application/mac-binhex40', <br>
'htm' => 'text/html', <br>
'html' => 'text/html', <br>
'ice' => 'x-conference/x-cooltalk', <br>
'ico' => 'image/x-icon', <br>
'ics' => 'text/calendar', <br>
'ief' => 'image/ief', <br>
'ifb' => 'text/calendar', <br>
'iges' => 'model/iges', <br>
'igs' => 'model/iges', <br>
'jnlp' => 'application/x-java-jnlp-file', <br>
'jp2' => 'image/jp2', <br>
'jpe' => 'image/jpeg', <br>
'jpeg' => 'image/jpeg', <br>
'jpg' => 'image/jpeg', <br>
'js' => 'application/x-javascript', <br>
'kar' => 'audio/midi', <br>
'latex' => 'application/x-latex', <br>
'lha' => 'application/octet-stream', <br>
'lzh' => 'application/octet-stream', <br>
'm3u' => 'audio/x-mpegurl', <br>
'm4a' => 'audio/mp4a-latm', <br>
'm4p' => 'audio/mp4a-latm', <br>
'm4u' => 'video/vnd.mpegurl', <br>
'm4v' => 'video/x-m4v', <br>
'mac' => 'image/x-macpaint', <br>
'man' => 'application/x-troff-man', <br>
'mathml' => 'application/mathml+xml', <br>
'me' => 'application/x-troff-me', <br>
'mesh' => 'model/mesh', <br>
'mid' => 'audio/midi', <br>
'midi' => 'audio/midi', <br>
'mif' => 'application/vnd.mif', <br>
'mov' => 'video/quicktime', <br>
'movie' => 'video/x-sgi-movie', <br>
'mp2' => 'audio/mpeg', <br>
'mp3' => 'audio/mpeg', <br>
'mp4' => 'video/mp4', <br>
'mpe' => 'video/mpeg', <br>
'mpeg' => 'video/mpeg', <br>
'mpg' => 'video/mpeg', <br>
'mpga' => 'audio/mpeg', <br>
'ms' => 'application/x-troff-ms', <br>
'msh' => 'model/mesh', <br>
'mxu' => 'video/vnd.mpegurl', <br>
'nc' => 'application/x-netcdf', <br>
'oda' => 'application/oda', <br>
'ogg' => 'application/ogg', <br>
'ogv' => 'video/ogv', <br>
'pbm' => 'image/x-portable-bitmap', <br>
'pct' => 'image/pict', <br>
'pdb' => 'chemical/x-pdb', <br>
'pdf' => 'application/pdf', <br>
'pgm' => 'image/x-portable-graymap', <br>
'pgn' => 'application/x-chess-pgn', <br>
'pic' => 'image/pict', <br>
'pict' => 'image/pict', <br>
'png' => 'image/png', <br>
'pnm' => 'image/x-portable-anymap', <br>
'pnt' => 'image/x-macpaint', <br>
'pntg' => 'image/x-macpaint', <br>
'ppm' => 'image/x-portable-pixmap', <br>
'ppt' => 'application/vnd.ms-powerpoint', <br>
'ps' => 'application/postscript', <br>
'qt' => 'video/quicktime', <br>
'qti' => 'image/x-quicktime', <br>
'qtif' => 'image/x-quicktime', <br>
'ra' => 'audio/x-pn-realaudio', <br>
'ram' => 'audio/x-pn-realaudio', <br>
'ras' => 'image/x-cmu-raster', <br>
'rdf' => 'application/rdf+xml', <br>
'rgb' => 'image/x-rgb', <br>
'rm' => 'application/vnd.rn-realmedia', <br>
'roff' => 'application/x-troff', <br>
'rtf' => 'text/rtf', <br>
'rtx' => 'text/richtext', <br>
'sgm' => 'text/sgml', <br>
'sgml' => 'text/sgml', <br>
'sh' => 'application/x-sh', <br>
'shar' => 'application/x-shar', <br>
'silo' => 'model/mesh', <br>
'sit' => 'application/x-stuffit', <br>
'skd' => 'application/x-koan', <br>
'skm' => 'application/x-koan', <br>
'skp' => 'application/x-koan', <br>
'skt' => 'application/x-koan', <br>
'smi' => 'application/smil', <br>
'smil' => 'application/smil', <br>
'snd' => 'audio/basic', <br>
'so' => 'application/octet-stream', <br>
'spl' => 'application/x-futuresplash', <br>
'src' => 'application/x-wais-source', <br>
'sv4cpio' => 'application/x-sv4cpio', <br>
'sv4crc' => 'application/x-sv4crc', <br>
'svg' => 'image/svg+xml', <br>
'swf' => 'application/x-shockwave-flash', <br>
't' => 'application/x-troff', <br>
'tar' => 'application/x-tar', <br>
'tcl' => 'application/x-tcl', <br>
'tex' => 'application/x-tex', <br>
'texi' => 'application/x-texinfo', <br>
'texinfo' => 'application/x-texinfo', <br>
'tif' => 'image/tiff', <br>
'tiff' => 'image/tiff', <br>
'tr' => 'application/x-troff', <br>
'tsv' => 'text/tab-separated-values', <br>
'txt' => 'text/plain', <br>
'ustar' => 'application/x-ustar', <br>
'vcd' => 'application/x-cdlink', <br>
'vrml' => 'model/vrml', <br>
'vxml' => 'application/voicexml+xml', <br>
'wav' => 'audio/x-wav', <br>
'wbmp' => 'image/vnd.wap.wbmp', <br>
'wbxml' => 'application/vnd.wap.wbxml', <br>
'webm' => 'video/webm', <br>
'wml' => 'text/vnd.wap.wml', <br>
'wmlc' => 'application/vnd.wap.wmlc', <br>
'wmls' => 'text/vnd.wap.wmlscript', <br>
'wmlsc' => 'application/vnd.wap.wmlscriptc', <br>
'wmv' => 'video/x-ms-wmv', <br>
'wrl' => 'model/vrml', <br>
'xbm' => 'image/x-xbitmap', <br>
'xht' => 'application/xhtml+xml', <br>
'xhtml' => 'application/xhtml+xml', <br>
'xls' => 'application/vnd.ms-excel', <br>
'xml' => 'application/xml', <br>
'xpm' => 'image/x-xpixmap', <br>
'xsl' => 'application/xml', <br>
'xslt' => 'application/xslt+xml', <br>
'xul' => 'application/vnd.mozilla.xul+xml', <br>
'xwd' => 'image/x-xwindowdump', <br>
'xyz' => 'chemical/x-xyz', <br>
'zip' => 'application/zip' <br>
);<br>
<br>
return isset($mime_types[$ext]) ? $mime_types[$ext] : 'application/octet-stream';<br>
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